Valve offers you:
Entire infrastructure and great download servers. Anticheat, hosting mods on the server, forums, community gallery, reviews and visibility based on your reviews and category, easy way to update the game, do dlc and all other things and making your game run on linux.
Valve dont get shit since the value they provide for the 30% is cheaper compared to what it would cost you to do it yourself. Besides they were undercutting the market in the beginning.
Iirc valve will even allow devs to generate as many steam keys as they want and sell them outside of steam for no cut whatsoever (and Steam will still provide support for the game on the launcher for those keys). And virtually no devs do it. They prefer to take the 30%. So that tells me that what they charge is more than fair to the devs
Valve offers you: Entire infrastructure and great download servers. Anticheat, hosting mods on the server, forums, community gallery, reviews and visibility based on your reviews and category, easy way to update the game, do dlc and all other things and making your game run on linux.
Valve dont get shit since the value they provide for the 30% is cheaper compared to what it would cost you to do it yourself. Besides they were undercutting the market in the beginning.
Iirc valve will even allow devs to generate as many steam keys as they want and sell them outside of steam for no cut whatsoever (and Steam will still provide support for the game on the launcher for those keys). And virtually no devs do it. They prefer to take the 30%. So that tells me that what they charge is more than fair to the devs